The 3 Best Radiators for 6.7 Cummins RAM Trucks [Reviews & Guide]

Looking for the best radiator for 6.7 Cummins? Check out our top three picks and a buyer’s guide to help you make the best choice for your truck.

If you own a 6.7 Cummins RAM truck, then you know that keeping your engine running cool is crucial for its performance and longevity. A faulty radiator can cause your engine to overheat, leading to decreased performance and even costly repairs. So, what are the best radiators for 6.7 Cummins?

When it comes to finding the best radiator for 6.7 Cummins, there are a few things you’ll want to keep in mind:

1. Choosing a radiator specifically designed for Cummins (diesel) engines is important.
2. You’ll want to ensure that the radiator you select can handle the high temperatures generated by these engines.
3. You’ll want to choose a radiator that offers good value for the price.

With those factors in mind, let’s look at three of the best radiators for 6.7 Cummins RAM trucks.

REVIEWS: 3 Best radiators for 6.7 Cummins RAM 2500 & 3500 trucks

Mishimoto MMRAD-RAM-03 performance radiator for RAM Cummins 6.7L 2003-09

Highlights

• Compatible with 2003-09 Dodge 5.9L/6.7L Cummins diesel vehicle
• Complete aluminum construction and durable, TIG-welded end tanks
• Efficient two-row, brazed aluminum core
• 1.2 Bars high-pressure rad cap to safely raise the coolant boiling point
• Equipped with a Magnetic Drain Plug to sift any metallic debris in the cooling system
• Optimal and faster heat dissipation for the best engine performance
• Provide efficient temperature reduction for towing, hauling, or during aggressive driving
• It works perfectly for both stock and modified trucks
• Mishimoto Lifetime Warranty

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If you’re looking for a radiator specifically designed for 2003-09 Dodge Cummins (diesel) engines, the Mishimoto MMRAD-RAM-03 is a great option. It has a full aluminum construction and features TIG-welded end tanks, making it durable and long-lasting. The radiator is equipped with a high-pressure rad cap with 1.2 Bars capacity to safely and efficiently raise the coolant boiling point. The magnetic drain plug, on the other hand, helps keep your engine running cool.

The radiator offers a large surface area for faster and optimal heat dissipation. It goes hand in hand to help you keep the engine temperature under control in aggressive driving, towing, and hauling situations. And if that wasn’t enough, the Mishimoto MMRAD-RAM-03 also comes with a lifetime warranty. It’s relatively easy to install for intermediates and fits perfectly on both stock and modified trucks. So, if you’re looking for the best radiator for 6.7 Cummins RAM trucks, the Mishimoto MMRAD-RAM-03 should be at the top of your list.

Mishimoto MMRAD-RAM-13 performance radiator for 2013-18 6.7 Cummins

Highlights

• Fits 2013–18 Dodge RAM 6.7L Cummins trucks (2500 & 3500)
• Provides increased coolant capacity and surface area by 63% & 41%, respectively, for faster, max cooling
• Features full aluminum construction and TIG-welded end tanks
• 2″ thick, three-row core for efficient cooling under high loads
• Equips magnetic drain plug to capture any metallic debris in the cooling system
• Keeps your engine from getting hot under intensive load
• Comes with a lifetime manufacture warranty

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Another reliable option that you can go with for your 2013-18 6.7 Cummins RAM truck is Mishimoto MMRAD-RAM-13. The performance radiator brings in an excellent fitment for your truck model. It equips increased coolant capacity and surface area to maximize cooling at the fastest speed possible. The MMRAD RAM 13 is packed with full aluminum construction and TIG-welded end tanks and fittings that will surely last the life of your truck.

In addition, it has a 2″ thick, three-row core for effective cooling under extreme loads. The radiator kit includes a magnetic drain plug to capture metallic fragments in your cooling system. The Mishimoto MMRAD-RAM-13 is a terrific option to keep your engine from getting hot under intensive load. Plus, the manufacturer provides a lifetime warranty for this product.

CoolingSky budget radiator for Dodge Ram 2500/3500 6.7L Cummins 2003-2009

Highlights

• Compatible with 2003-09 6.7L Cummins RAM 2500 & 3500 trucks
• It features high-density multi-louvered fins for maximum cooling efficiency up and beyond 35% and durability in extreme weather.
• Boost engine functions and protect it from overheating.
• Made from high-grade aluminum metal and 100% TIG welding
• Lightweight construction, 100% brazed aluminum, and a polished end tank. 
• Tested to drop a 25degF drop in outlet temp compared to the OEM. 
• Effortless installation with no cutting or modification is required.
• Cross Flow radiation type

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Last, one of the best radiators for 6.7 Cummins diesel is the CoolingSky. It’s ideal for truckers out shopping for radiators on a strict budget. The CoolingSky is compatible with all 2003-2009 6.7L Cummins RAM 2500 & 3500 trucks. It features high-density, multi-louvered fins for maximum cooling efficiency and durability in extreme weather conditions.

The CoolingSky is crafted with a lightweight structure and 100% brazed aluminum for long service life and minimal footprint. It has also been tested to drop the outlet temperature by 25 degrees Fahrenheit compared to the OEM. The installation is easy, with no cutting or modification needed whatsoever.

Radiator buying guide: What to look for?

There are a few factors you will want to consider when purchasing a radiator for your 6.7 Cummins RAM truck or any vehicle, for that matter. These include:

The size of the radiator. You will want to ensure that the radiator you buy is the proper size for your vehicle. Obviously, not all radiators are created equal; some will be too small or too large for your particular car or truck. The best is to check if the manufacturer has listed your vehicle model in his list of compatible vehicles.

The type of radiator. There are two types of radiators available on the market, plastic, and aluminum. Aluminum radiators are typically more expensive than plastic radiators. However, aluminum radiators last longer and dissipate heat better than their plastic counterparts. If you are looking for the best possible performance from your radiator, then an aluminum radiator is the best option. However, a plastic radiator will still get the job done if you are on a budget.

The cooling capacity. This is arguably the most important factor to consider when purchasing a radiator. You will want to make sure that the radiator you purchase can adequately cool your engine. The best way to determine this is to look at the cooling capacity of the radiator. This is typically measured in BTUs (British Thermal Units). The higher the BTU rating, the better the radiator will be at cooling your engine.

The price. Radiators can range in price from a few hundred dollars to over a thousand dollars. The best way to determine if you are getting a good deal is to compare the prices of radiators with similar cooling capacities. You will also want to consider the type of radiator and the materials used to construct the radiator. Typically, aluminum radiators are more expensive than their plastic counterparts.